CVE-2020-26302

Summary

is.js is a general-purpose check library. Versions 0.9.0 and prior contain one or more regular expressions that are vulnerable to Regular Expression Denial of Service (ReDoS). is.js uses a regex copy-pasted from a gist to validate URLs. Trying to validate a malicious string can cause the regex to loop “forever." This vulnerability was found using a CodeQL query which identifies inefficient regular expressions. is.js has no patch for this issue.

Affected Software

Weaknesses

• CWE-400: CWE-400 Uncontrolled Resource Consumption

ADP Enrichment

CVE Program Container

Additional References

• https://securitylab.github.com/advisories/GHSL-2020-295-redos-is.js
• https://github.com/arasatasaygin/is.js/issues/320

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: yes
  • Technical Impact: partial

References

• https://securitylab.github.com/advisories/GHSL-2020-295-redos-is.js
• https://github.com/arasatasaygin/is.js/issues/320

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